add tud_hid_n_gamepad_report() helper for gamepad report

- Add gamepad to hid_composite example. Though it needs a bit of extra
work but it will come later as separated PR.

src/class/hid/hid_device.c

@@ -107,9 +107,6 @@ bool tud_hid_n_boot_mode(uint8_t itf)
   return _hidd_itf[itf].boot_mode;
 }
 
-//--------------------------------------------------------------------+
-// KEYBOARD API
-//--------------------------------------------------------------------+
 bool tud_hid_n_keyboard_report(uint8_t itf, uint8_t report_id, uint8_t modifier, uint8_t keycode[6])
 {
   hid_keyboard_report_t report;
@@ -127,10 +124,8 @@ bool tud_hid_n_keyboard_report(uint8_t itf, uint8_t report_id, uint8_t modifier,
   return tud_hid_n_report(itf, report_id, &report, sizeof(report));
 }
 
-//--------------------------------------------------------------------+
-// MOUSE APPLICATION API
-//--------------------------------------------------------------------+
-bool tud_hid_n_mouse_report(uint8_t itf, uint8_t report_id, uint8_t buttons, int8_t x, int8_t y, int8_t vertical, int8_t horizontal)
+bool tud_hid_n_mouse_report(uint8_t itf, uint8_t report_id,
+                            uint8_t buttons, int8_t x, int8_t y, int8_t vertical, int8_t horizontal)
 {
   hid_mouse_report_t report =
   {
@@ -144,6 +139,24 @@ bool tud_hid_n_mouse_report(uint8_t itf, uint8_t report_id, uint8_t buttons, int
   return tud_hid_n_report(itf, report_id, &report, sizeof(report));
 }
 
+bool tud_hid_n_gamepad_report(uint8_t itf, uint8_t report_id,
+                              int8_t x, int8_t y, int8_t z, int8_t rz, int8_t rx, int8_t ry, uint8_t hat, uint16_t buttons)
+{
+  hid_gamepad_report_t report =
+  {
+    .x       = x,
+    .y       = y,
+    .z       = z,
+    .rz      = rz,
+    .rx      = rx,
+    .ry      = ry,
+    .hat     = hat,
+    .buttons = buttons,
+  };
+
+  return tud_hid_n_report(itf, report_id, &report, sizeof(report));
+}
+
 //--------------------------------------------------------------------+
 // USBD-CLASS API
 //--------------------------------------------------------------------+